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Example: 5 3/4 + 6 5/6 = ?

5 + 6 = 11

3/4 + 5/6 = ?

I. The LCD of 3/4 and 5/6 is 2×2×3 = 12
II. 3/4 = 9/12 and 5/6 = 10/12
III. 9/12 + 10/12 = 19/12.
IV. 19/12 cannot be reduced further
V. As a mixed number, 19/12 = 1 7/12
11 + 1 7/12 = 12 7/12
Thus, 5 3/4 + 6 5/6 = 12 7/12

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